变质量物体的运动微分方程的研究

An investigation of moving equation of change-quality body

工科大学物理中,在介绍牛顿运动定律时,主要涉及的是定质量物体的运动情况,对于变质量物体的运动涉及的很少,本文先从动量定理出发推导出变质量物体的动力学方程的三个表达式,然后对这三个表达式分别进行了详细的讨论,最后通过具体实例能够使我们进一步加深对其的理解。

In physics of university,introducing Newtons law of motion,the motion of the unchangequality body is mainly involved and the one of the changequality body is less informed.The article starts from the momentum theorem to deduce the three expressions of the momentum equation of the changequality body and then makes a detailed discussion on each of them.Finally,the concrete examples are given to have an exhaustive study.